Upsetting mechanism



Aug. 24, 1943. R; L. wlLcox 2,327,479

UPSETTING MECHANISM Filed may 18, 1942 (IIIV l N V E N TO R Fic/)ard [es/er M/i/cox f I I .l

ATTORNEY `successively moved into line Patented ug. 24, 17943 Richard Lester `Wilcox,

chine Company, tion of Connecticut Waterbury, Conn., assign-Y or to The Waterbury Farrel Foundry and Ma- Waterbury,

Conn., a. corpora- Application May 18, 1942, Serial No. 443,407

10 Claims.

rThis invention relates to new and useful improvements in upsetting mechanism, more particularly to mechanism for holding a workpiece in proper relation to the tools during the action thereof and for clearing the punch of the workpiece if held therein. I

In headers, upsetting machines or 'the like, a workpiece is conventionally upset by companion tools, one a die and the other a punch. yThese tools function by moving one toward the other, generally the punch, the workpiecer being presented to the die, and while held thereby is subjected to pressure blows by one'or more punches therewith. In the upsetting mechanism herein shown, two punch blows are contemplated, thev workpiece being partiallyupset by the rst blow and completedat the second blow. After the punch has partially upset the workpiece, the latter, upon occasion, remains in the punch and is Withdrawn from the die. This is abnormal, asthe workpiece should remain in the die and the punch withdrawn therefrom. The 'position of each punch after withdrawal is shifted and the neXt succeeding punch is moved into line with the die and engagesthe workpiece as it travels toward the'die, provided the workpiece is still inthe die. Ii, however, the Y workpiece has been withdrawn from Ythe die by the nrst punch and remains therein, it Will strike the toois or some part of the machine during the next forward movement of the punch, frequently breaking the tools and stopping the machine by jammingthe workpiece inan abnormal position. In such case, production is delayed by the length of time it takes Vfor the operator to separate the workpiece from the tools, this latter usually being accomplished by driving or drilling it out of its obstruction position, and if broken, to remove and replace the broken tools. To prevent this action is an object of the invention. This is accomplished by associating mechanism with the punch which will prevent the workpiece from being withdrawn from the die and retained in the punch, but if perchance it is withdrawn and retained, it will be ejected therefrom. This invention is particularly applied as illustrated and described in connection with the so-called spring punch, wherein the punch is movably mounted within the punch holder and engages the die prior to the completion of the forward strokeof the gate, during which time the punch is at restf It is an object of thisinvention to` provide an improved spring punch and mechanism inconnectontherewth that will hold the workpiece rigid in the die against movement during a portion of the withdrawal action of the gate and punch. Other objects will vbecome apparent from the Yfollowing description and the accompanying drawing. 1

To these ends the invention consists in vthe upsetting mechanism, having certain details 0f construction and combinations of parts, as will be hereinafter described and more particularly pointed out in the claims.

Referring to the drawing, in which like numerals of reference indicateV like parts inthe several gures:

Figure 1 is a fragmentary View of a portion of an upsetting mechanism, header or the like, having this improved mechanism associated therewith, the parts in section being takengenerally upon a plane that extends through the centers of both punches;

Figure 2 is a view of the punch sleeve and some adjacent parts;

Figures 3 and 4 are views of the backing plate; and

Figure 5 is a perspective detail view of the punch upon a relatively enlarged scale.

`In the drawing, the numeral I!) indicatesV the vgate of a header, upsetting machine or the like,

movably mounted in a frame II; 49 the fabricating die; and the knockout pin. Slidably mounted on the face of the gate is a carrier slide I2, upon which are the backing plates I3 and I4. Adjustable relatively to the carrier slide I2, and the backing plates I3 and I4, are the punch holders I5 and I6, in the former of which is. a punch Il, held rigid by any convenient and well known means, and in the punch holder Iii is a spring punch, shown herein as constructed with Aa. sleeve I 8, having a chamber I 9 in its rear end with a slot 2d extending through the wall thereof, and in register with a slot 2l in the punch holder IS. Slidably mounted within the sleeve I8 is a punch 22 having an opening 23 therethrough, and upon the exterior is a shoulder 24, formed at the junction of two diameters'thereof. The larger of these diameters is substantially the same as the chamber IS, and the relative `outward position of the punch 4is determined by er1- gagement of this shoulder with the end wall of the chamber substantially as shown in Figure 1.

, The inner face ofthe punch has an angular portion 5| that increases-.the fopen space in the .chamber i3 upon Vone side of Vthe center thereof.

The punch' is held against `rotation in the sleeve I8 by a pin 25 fixed in the 'sieeve and projecting into a recess 25 in thelarger diameter of the punch. Movably mounted Within the opening 23 of the punch 22 is a pin 2l', having a head `lll, which in one position enters the recess 26 at the inner end of the opening 23.

Within the punch holder i6, in rear of the sleeve I8, is a backing plate 29, upon the inner face of which are lips 3i! which project into notches 3| in the rear end of the sleeve l and thus holdv the backing plate and sleeve against relative rotation. The backing plate 2Q is held against rotation by a pin which istin the punch holder l5 and projects into a notch 33 in the backing plate. In the outside wall o the larger diameter of the punch 22 are a plurality of notches 34, illustrated herein 'as three in numbe substantially as shown in Figures 2 and 5, one being substantially opposite the slot 2&3, and the others substantially 90 uponeach side thereof Within each recess, and surrounding a pin 35 fixed in the backing plate 29, is a compression y,

spring'. E5, which operates to urge the punch 22 outwardly; This actionislimited by the engagement of theshoulder- .'24v with the end wall of the chamber i9 in the sleeve i8 in the mannery hereinbeiore, described.' Heretofore only one spring has been utilized in a spring punch. 1f such springbreaks the punch becomes inoperative with possible injury tofthe'punch and associated-parts, and damage to succeeding workpieces, until the break is discovered. In this sprinfT punch having a plurality of springs, such adverse conditions cannot prevail. n A

Journaled upon a pin 5'?, ixed in a lug 3S on thefpunch holder iii,- is a rock lever 33, one arm ofwhich projects throughA the slots 2i)l and 2 l, with the. head @El thereon inthe chamber ld,y and in line with the.l head itl, of the pin 2l. By this structure the lever may function withouty interferingk with theY operation of the punch 22er the yielding means (springs 36) by which the' punch 221s moved relatively tol the sleeve l. One 'arm of this rock lever projects rearwardly romthe punch holder and straddles a pin G2 slidably mounted in a screw plug. c3, threaded into and closing theopen end-of a holevlli in the carrier slide l2. Between the head on thel pi-nlfvand thecsc-rew plug 33 is a spring and on thei outer end thereo'l:` are the; loch nuts fi'i, whichl bear against'thearmzo the lever During` movementgoi the` carrier slide i2 across the face of i the gate. it, thev outer end of the pin i2 engages a lug i8 on thegateithus positively moves'the pin 42, in one direction, imparting a rocking Inove+ mentto ,theileverz causing the head Gil thereon to .move in the chamber l toward the outer-end ofthe sleeve, i8 and'pushthe pin in advance thereof. Y

The pin 23', when in its rearmost position, is backedup by the. head of the rock lever 33,; which also is in engagement with the backing plateE, Asithegate l@ moves forward, that por;- tion ot the workepiece. prejectingbeyond the fabricatingy die i9- enters theopening in the spring. punch ,222` and continues such entry until theziace of the spring vpunch engages the fabricating die QS., Thespring punch remains. sta,- tionary in thisposition,.but the gate, punch holder andipinn, .continue their forward movement, duringtwhich:timepthepin 2 exerts `the required pressure on Vthe .workpiece and upsets that portion thereof: outside orcther esired shape, When vthe pin4 Ellis in its foremost positionandl for theiirst portion otthe returnimovementzof the gate, the leverf; under th'e tension ofthe spring. fst, applies suiicient These notches are preferably arranged,-

ofthe fabricating die into a cone pressure to the pin and through it to the workpiece to hold the workpiece in the fabricating die. During the first portion of the movement of the gate away from the fabricating die the spring punch 22 and pin 2T remain stationary until the end wall of the chamber I9 engages the shoulder 24 on the punch. Thereafter, the punch travels withthe punch holder,',the pinremainsstationary, and the springpunch isV drawn' over the pin, thereby stripping the punch from the workpiece.

The operation performed by the spring punch and;fabricating die usually cones or upsets that portion of the workpiece outside of the face of the fabricatingdieil'f.' After withdrawal of the spring .punchthesecond punch I1 is carried into alignment with'thefabricating die. During the next forward movement' of the gate the second punch completesy the workpiece by changing the upset portion thereof into the required iinished shape.

Within the scope of the following claims the invention-may be embodied in-various other forms Without-departingfrom its-spirit.`

What. is claimed-ds: y Y K l. Inl mechanism of the character described-zn punch helder, a .punch Vm-ovablymounted therein and having an 'axial opening therethrough,v yieldingmeansto urgethe--punch -inone direction with respect to. the punch holder,` afpin withinsaid opening, .and meansy irlidependentlyI movable with respectfto thepunch andyielding meansgfoi' imparting` movement to the pinvr independently o( saidpunch and yielding means; 2'.Y In. mechanismof the character described, a punch holder` having-.an opening. through one wall thereof, asleeve within -thefpunchholder having aF chamber in. one enf-11 ther-cor and having4 an openingin register with thefopeningfin'thepimh holder, aY punch movably mounted' within the sleeve, a pin-movable within-ethe-fpunch, a-rcck lever mounted upenfthefpunchhelderand having apart extendingthroughbothcf saideng-agingr saldi-pinA se te-actuate the latter when the rocio-lever is moved relativef: to sam punch` holder, and Ymeans 1foractuating-the said rockfleve-r v y 3 in mechanism ofthecharacter described;y a movable gate,VV af slide transverselyfmcvabie Ion the gate, a punch.holder-v'associatedwi-th the slider a fabricating die,A aspring biased f punch Amounted in. theypunch'helder; a pin movahly` mounted within the punch; and mean-s actua-ted; by.y the gate for mov-ing; the a; predetermined distance within the punchV independently cfr/the latter' and formair-i-tain-ingtheA sax-nein; a station-ary positionwith. relationtothehfabricating die during a portion yoi the :return Ymovementl or i the gate.

4; In mechanism ofthefcharacter described, a movable.V gate; ,aI slide-movable on' the-gate, a. punch-holder associated 4with. thef'slide: av fabrie eating die ',1 a mounted in' the 'punch' hoidier; means normally` biasingl zthepunch toj one position ther punchv holder,v ar pin movablyf'moumed within'` the,A punch; rnovable'meansi carried by: the punch holder having a: part enga'gingthe4 pimy auii havingia secondypaii't dispesedin the path ofthe gate wherebyfmovement oi'thelajtter, w'il'lfactuate saidfnieans: and ltire-roby;` the'pin 'a predetermined,distance-withirr thezpunch and to mains tai-n `the pinging a predetermined stationaryfpsition with relation Lto; the-fiabricatingi. die' during a-portio-n-- o if. theV return, rnevemento ther gates' Y 5.-In, mechanism=of vthe" character desciibd, havlzngc ax punch holder; af spring; biasedepunh' mounted-therein; afmovabl'er pinwithin'. the punch,

a fabricating `diegfancl means for movingihe-pnh holder toward and away from the fabricating die; the combination therewith of 'means for holding the pin rigid against the workpiece in the fabricating die during movement of the punch holder away from the fabricating die and while the engagement with the fabricating die and workpiece by said punch biasing means.

6. In mechanism of the character described for holding the pin rigid against the workpiece in the fabricating die during movement of the punch holder away from the fabricating die and while the punch is held in eng'agementwith theY fabricating die and workpiece by its biasing means, comprising in part, apivoted lever, one portion of which is between the end of the pin and a rigid part of the punch holder, and means for actuating the lever and thereby the pin inV timed relation with the movement of Ithe spring biasedpunch.

7. In mechanism of the character described having a punch holder, a spring biased punchmounted therein, a movable pin within the punch, a fabricating die, and means for moving the punch holder toward and away from the Yfabricat- Y ing die; the combination therewith of means for holding the pin rigid against the workpiece in the fabricating die during movement of the punch holder away from the fabricating die and while the punch is held in engagement with the fabricating die and workpiece by its biasing means, comprising in part, a pivoted lever having a portion disposed between the end of the pin and a rigid part of the punch holder, and another porment with respect to the latter, means for moving the pin within the actuating said first and second mea-ns.

9. In mechanism of the character described, having a punch holder, a spring biased punch having a pin movably mounted therein, a fabrimounted within the punclrholder, a pin movably the punch, Vsaid punch having both` synchronous and independent movement away from the fabricating die; therewith of means for holding the pin against a workpiece in the fabricating die during a portion of the the spring biased punch is-drawn over the pin to.

the workpiece.

RICHARD LESTER WILC'OX. 

